/*
 * Copyright 2016 Code Above Lab LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.codeabovelab.dm.common.json;

import com.codeabovelab.dm.common.utils.Keeper;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

/**
 */
class KeeperSerializer extends JsonSerializer<Keeper> {

    @Override
    @SuppressWarnings("unchecked")
    public void serialize(Keeper value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        if(value.isChanged()) {
            gen.writeObject(value.get());
        } else {
            gen.writeNull();
        }
    }
}
